I don’t have my 2100 in front of me. But I do think your throttle lever looks different than mine. Like maybe it had a different throttle body swapped under it as some point?
I’m not sure if you have a “throw” problem or just a “rod length” problem. But either is correctable. Measure your how far you can get the vertical throttle rod from the engine to move up and down. Then measure how far the lever on the carb will travel from its lower most position to its upper most.
I think it’s more likely that you have a rod length problem. When I get motivated enough to go brave the extreme cold, I can go out and take a pic of some mods I did to mine. All-thread and one or two throttle pivot linkages, or heim joints, will make it operate a lot smoother than the original.
On another note….
I got a little lost in the discussion about numbers. Was there any conclusion as to whether you have a throttle body or shaft from a different model YF? I’m confident you can get full throttle and closed throttle positions straightened out. But if that is the wrong throttle body, there’s a ~slight~ chance you don’t have the right vac passages in the right places to make it run properly.
